Physics GK · all questions

Work, Energy and Power
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Q201

What will be the momentum of a body of mass 50 kg moving at a speed of 20 ms^-1?

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Q202

What is the sum of the kinetic energy and potential energy of an object is called?

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Q203

Which of the following physical quantity measures the rate of work done?

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Q204

An object with mass 'M' moves with speed 'V' and has kinetic energy 'A'. If its velocity is doubled, So what will be its kinetic energy-

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Q205

Mohan having a mass of 40 kg. He climbs 50 steps of a staircase in 10s. If the height of each step is 15cm then what is his power?
(g = 10 m/s²)

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Q206

What is the force exerted on any object by a solid surface in the normal direction?

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Q207

If an object is grabbed by both the ends and the force applied on it is called . . . . . . . .

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Q208

The working principle of a washing machine is

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Q209

Which of the following is an example of potential energy?
1. Bricks placed on the roof of the house
2. Spring of a clock when it rotates
3. Compressed spring
4. Stored water in an elevated reservoir under the water supply system

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Q210

An object weighing 20 kg is raised through a height of 2m. What will be the work done by the force of gravity in this process?
Take g = 10m/s²

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Q211

A porter lifts 500 N up to a distance of 100 meters work done by the porter is-

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Q212

A person is sitting in a car which is at rest. The reaction from the road at each of the four wheels of the car is R. When the car runs on a straight level road, how will the reaction at either of the front wheels vary?

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Q213

An object with 200 g mass will have momentum with its 10 J kinetic energy-

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Q214

Mass × acceleration = ?

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Q215

The energy stored in a watch spring is

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Q216

If an object of mass m is raised to height h from the ground, force is required for this action. The minimum force required to lift an object is the same as . . . . . . . .

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Q217

Assertion (A) A spring has potential energy, both when it is compressed or stretched.
Reason (R) In compressing or stretching, work is done on the spring against the restoring force.

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Q218

An object of 13kg mass is moving with constant speed of 5m/s, what will be kinetic energy contained in the object?

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Q219

An object of mass 20 kg is moving with an uniform velocity of 5 ms^-1. What is the kinetic energy possessed by it?

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Q220

A constant force acts on an object of mass 5 kg for a period of 2 seconds. This increases the velocity of the object from 6 ms^-1 to 8 ms^-1. Find the amount of force applied.

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